." >> it's a hobby popular with celebs like dakota fanning, cameron diaz, julia roberts, and even russell crowe, and as emily reports, it's catching on with teens, as well. >> i'm here at lion brand yarn studio, where i'll try my hand at a craft that dates back to ancient egypt. let's go inside. it's an explosion of color and an endless supply of inspiration. knitting is where the nimble put their needles and their creativity to the test. what are you working on today? >> today, i'm working on a sweater. >> right now, i'm working on leg warmers. >> a headband. >> knitting's not just for grandma anymore. >> and what i love about you teen knitters so much is your imagination. i'm blown away by some of the projects i see you guys do, and the color combinations are sometimes things that i wouldn't think of, but they're fantastic. >> you have your yarn and you have your needles, and you want to make a slipknot. which you do that by wrapping the yard around your fingers. that's pretty much the most -- one of the simplest parts of passing on. >> korrina's helping me create my first sweater. this